| De overige wijzigingen in de boekwaarde van de goodwill. | nl | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Sonstige Mutationen des Firmenwerts | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Other movements of goodwill | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Autres mouvements du goodwill | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Overige mutaties van goodwill | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Sonstige Mutationen | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Other movements | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Autres mouvements | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Overige mutaties | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |